Pxcture-mat-gutting  device



Patented Peb. 7, X893.

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WITNESSES:

(No Mode.) 5 Sheets-Smet 3 E. L. GAYLORD. PGTURE MAT CUTTING DEVICE.

Patented Peb, 7, i893.

VMTN ESSES:

ATTORNEY- (No Model.) 5 sheets-sheet 4.

E. Lt GAYLORD.. PICTURE MAT CUTTING DEVICE.

Patented-Feb. f?, 18%.

WXTNESSES:

momm- (No Mode.) 5 Sheets- Sheet 5.

E. L. GAYLORD.

PICTURE MAT CUTTING DEVICE.

Patented Feb. 7, 1893.

NoA 491,307.

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ATTORN EY paens co, moro-urne" wunmomw iluirnn Sintes' Parham @reina EDVARD L. GAYLORD, OF BRIDGEPORT, CONNECTICUT.

PiCTURE-MAT-CUTTlNG DEVlCE.

SPECFUATIN forming part of Letters Application tiled September 8,189

.To @ZZ when?. it may concern,.-

Be it known that l, EDWARD L. GAYLORD, a citizen ofthe United States, residing at Bridgepori', in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Picture-Mat-Cuttin g Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the ari to which it appertains to make and use the same.

My invention relates to certain new and useful improvements in machines for cutting picture mais and the like, and has for its objects to facilitate the laying out of the mat and to aiiord means for cutting the latter with great dispatch.

in the accompanying drawings,-Figure 1 is a plan of my machine. Fig. 2, a rear elevation, the clamp bar being in elevated position. l'fig. 8, a view similar to Fig. 2, but with the parallel rule removed and the clamp-bar depressed. Fig. et, a section at the line a, a, ot' Fig. 1. Fig. 5, a section at the line l), h,of Fig. 1, looking in the direction of the arrows c. Fig. (i, a section also at the line l), b, of Fig. 1, but looking in the direction of the arrows tl and showing the clamp-bar raised. Fig. 7, a detail perspective of the clamp-bar. Fig. 8, a detail perspective of the mat marker device. Fig. 9, a detail broken bottom view of said device showing the marker proper. Fig. 10, afront elevation of my improved knife, and Figs. 11 and 12, sections at the lines e andf, respectively, on Fig. 10.

Similar numbers of reference denote like parts in the several iigures of the drawings.

l is the table or bed of my improvement adapted to be secured on a work bench or the like in any ordinary manner.

2 is a cutting surface preferably of glass which is secured in the bed flush with the top thereof, as shown particularly at Fig. 4.

3 is the clamp bar made of metal-preferably steel-and having rising therefrom and extending longitudinally thereof a rib Ll which serves as a guide rest for the cutting knife. This rib fl 'is chanifered along its upper edges in order to give it a nice finish. Secured at the ends of the bar 3 are hangers 5 having therein vertical gates 6. At the lower ends of these gates are shoes 7 which are swiveled to Patent No. 491,307', dated February *7, 1893.

2. Serialllmll/l. (No model.)

screws 8 which latter are passed through the bottoms of the hangers, and by the manipulation of these screws the shoes are elevated or lowered ior the purpose presently explained. The clamp-bar rests upon the bed with the hangers embracing opposite sides of said bed in such manner that said hangers may be elevated or lowered to raise or depress the bar. 9 is a slide-bar beneath the bed and having its ends formed with wedges 10, 11,which extend through the gates G in the hangers.

12 is a bracket extended from the bed, and 13 is a lever pivoted to said bracket.

le is a link whose ends are pivoted at 15, 16, respectively, to said lever and the bar 9.

17 is a iiat spring whose ends are capable of being depressed by the hangers when the latter are lowered, and 18 is a screw which is passed through a nut 19 secured to the bed and bears against the bottom of the spring midway of its length by means of which screw the spring may be properly set up.

From the foregoing it will be seen that when the lever 13 is thrown in the two positions shown at Figs. 2 and 3 the clamp bar will be respectively raised and lowered, the lowering being effected by the positive action of the wedges against the resiliency of the spring while the raising is accomplished by the action of the spring on the withdrawal of the wedges. To compensate for wear on the wedges, or to properly adj ust the vertical movement of the clamp-bar, the shoes 7 are raised or lowered as occasion may demand.

At the left of the machine and extending in a direction at right angles to the clampbar is a raised strip 2O which is scaled into inches and fractions of an inch.

21 is a plate which has a lip 22 depending beneath the rear edge of the strip 20, said plate adapted to slide freely lengthwise of said strip.

28 is a keeper which is secured to the rear of said strip in order to secure the plate as against displacement.

Hinged at 2i to the plate 2l is a gage bar 25 marked olf as in the instance of the strip 2O and 2G is a frame arranged to slide on said bar.

27 is a friction spring which bears against the oar and frame to prevent accidental slipping of the latter. Depending from the bot- IOO tom of the frame is the marker 2S which consists of a rectangularserrated foot shown particularly at Fig. 9.

29 is a flat spring secured to the bottom of the bar 25 and bearing against the strip 20, whereby said bar is normally elevated to keep the marker from dragging on the mat to be cut. The keeper 23 may of course extend throughout the length of the strip 2O if desired.

30 is an ordinary parallel rule or adjustable straight edge secured to the top of the bed in the immediate rear of the clamp bar.

The manner of laying olf the mat by the use of my instrumentis as follows. The mat is first trimmed to the desired size by placing it on the bed with one edge against the strip 2O while the rear edge extends beneath the clamp bar. The edges are successively trimmed by cutting them along the rear of the clamp-bar. The margin of the mat around the opening to be eut is determined, and it is the office of my machine to accurately lay off this in argin. The mat is squared along the strip 2O and the rear edge of the clamp bar, and the lever 13 is operated to depress said bar firmly against the mat. The gagebar 25 is now pushed along the strip until the rear edge of said bar reaches the proper distance as denoted by the scale on said strip, which distance is the width of the margin desired between the opening to be eut and the edge of the mat which is flush with the rear edge of the clamp-bar. The frame 26 is now pushed along the gage bar until the proper marginal distance is registered with respect to the edge of the mat which extends along the side of the strip 20. The end of the gage bar is now depressed thereby causing the serrated marker to make a rectangular indentation upon the mat, whereby one corner of the desired opening is found, and the remaining corners are marked in like manner. The mat is next adj usted and clamped beneath the bar 3, the indented corners being properly registered at the front edge of said bar, and the mat is cut in the usual manner to provide the desired opening. In cutting similar openings in two or more mats of the same size, I adjust the straight edge 30 to such a position that when the rear edge of the mat is in abutment therewith, the indented corners will be in proper position with respect to the front edge of the clamp-bar, and I am thereby enabled to cut opposite sides of similar mats with great rapidity. But, in cutting large numbers of similar mats, much time is consumed in the marking of corners, notwithstanding the fact that they do not have to be found except in the instance of the first mat. I have therefore provided an attachment, which, while it is unnecessary in the cutting of single mats, is of great value in the cutting of considerable numbers of similar mats, and this attachment I will new describe.

31 and 32 are clips adapted to slide freely on the rib 4 of the clamp-bar, each clip having set screws 33, 34, respectively, whereby such clips may be secured at any desired points along said rib.

35 is an adjustable stop capable of sliding along said rib and provided with a set screw 36 for fixing said stop in any desired adjustment.

37 is a gage-plate confined against the front vertical wall of the rib by the clip 32 and stop 35 and having at its inner end a lip 38 which acts as a stop to the clip 32.

39 and 40 are fingers which project forward from the clips 3l and 32 and overhang the front edge of the clamp bar.

The corners of a mat opening having been indented as before set forth, the clips 3l 32 are moved so that their lingers 39, 40, register with such corners at the edge of the clamp bar. rlhe plate 37 is then thrown back until its lip 38 abuts against the clip 32. The stop 5 is moved along the rib to a predetermined distance from the clip 32, and said stop and both clips are secured in their adjustments by their respective set screws.

The mat opening is generally longer one way than the other, and in cutting the long side the screw 34 is loosened and the clip 32 pushed back against the stop 35, the distance between the stop and the clip 32 (see Fig. 7) being' predetermined by the difference between the two lengths of the mat opening. Therefore, after the clips and the stop 35 have once been located with respect to the indented corners of the short and long sides of the mat opening, similar mats may be successively cut without the use of the marker for the corners since the fingers 39, 40 arrest the cutting knife within the limits prescribed by the dimensions of the opening.

In connection with my improvements hereinbefore set forth I provide an exceedingly novel and useful cutting knife which I will now describe.

41 is a handle preferably of wood and having a way 42 within which the knife 43 is placed.

44 is a cover plate secured by screws 45 to the handle at the lower part thereof and immediately over the way 42. Depending from the plate 44 is a stop guide 46 which has two notches 47, 48, which are in different vertical planes.

49 is a set screw by means of which the knife is secured within the way 42.

My improved knife is used in the following manner. The stop 46 is rested at one of its notches on the rib 4, whereby the cutting edge of the knife is positively raised so that it will penetrate through the mat and no farther, the knive having been previously adjusted. The point of the knife is forced into the mat at one of theindented corners, and the knife is then drawn along the clamp-bar until the other corner is reached, when the handle is swung backward until the edge of the knife has cut up to the line which bisects the angle of junction of the sides of the mat IOC IIO

opening. W'hen used in connection with the clips and stops hereinbefore described, this knife overcomes great defect hitherto eX- pericnced in mat cutting, namely, the imperfcction of the corners of the mat opening and an inexperienced person can with my knife and machine out perfect mat openings. In cutting' mats, the bevel of whose opening is at a steep angle, the lower notch 4S is placed against the rib Ll, the knife being thereby brought into a position nearer a perpendicular than in the instance of the upper notch 47.

l. The combination of the graduated strip 2Q, the plate 2l capable of sliding along said strip, means for holding said plate in position the gage-bar hinged to said plate and carrying the adjustable marker, and the spring` 29 whereby said bar is normally elevated, substantially as set forth.

2. ln a mat-cutting machine, the combination of the bed, the clamp-bar supported on said bed and capable of being` elevated and lowered, the hangers depending from said bai` and provided with vertical gates, the slide bar abntted against the bottom of the bed and having;` inclines on the underside at its ends, which latter extend within said gates, the vertically adj nstable shoes in the bottoms of said hangers and affording supports for said inelines, the spring which keeps the clampbar normally raised, and means for moving the slidebar to and fro, substantially as shown and set forth.

3. The hercindescribed device for positively limiting the action of the cutting knife to a predetermined distance, the same comprising the clamp-bar having a raised rib, the clips 3l, 82, adapted to slide on said rib and provided with projecting lingers 39, 40, the stop also adapted to slide on said rib, the gageplate 87 confined against said rib by the clip 32 and stop 35 and having at its inner end a lip 3S, and means-as set screws-for securing said stop and clip in their adjustments, substantially as set forth.

4l. The hereindescribed knife for cutting mats, the same comprising a handle, a blade adjustable therein, and a stop-guide depending from said handle and provided with notches which are in different vertical planes, in combination with the guide-rib of the clamping-bar, substantially as set forth.

5. The combination of the handle ll, the knife adjustable within said handle,the plate secured to the handle over said knife, the stop guide depending from said plate and having notches as described, the set screw whereby said knife is secured in any desired adjustment, and the guide rib against which said stop guide bears when the knife is in operation, substantially as and for the purposes set forth.

In testimony whereof l affix my signature in presence of two witnesses.

EDWARD L. GAYLORD.

Witnesses:

l?. W. SMITH, Jr. J. S. limon. 

